Which of the following should be avoided when working with penta?

When working with penta, which is a potentially hazardous chemical, it is critical to prioritize safety and environmental protection. One of the most important practices to adhere to is avoiding actions that could lead to contamination or harm to ecosystems. Emptying containers freely into the environment represents a significant risk, as it could lead to unintended release of harmful substances, posing threats to both human health and the environment. Proper disposal methods must always be employed instead of discarding materials in an uncontrolled manner.

The other options reflect best practices in handling hazardous materials. Mixing in well-ventilated areas helps minimize inhalation risks, using appropriate personal protective equipment safeguards against skin and eye contact, and storing away from heat sources prevents accidental ignition or reaction. Each of these practices supports a safer working environment and reduces the likelihood of accidents.